8381660 has 96 divisors (see below), whose sum is σ = 22256640. Its totient is φ = 2585088.

The previous prime is 8381627. The next prime is 8381669. The reversal of 8381660 is 661838.

8381660 = T₁₅₄₄ + T₁₅₄₅ + ... + T₁₅₅₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61112 + ... + 61248.

It is an arithmetic number, because the mean of its divisors is an integer number (231840).

Almost surely, 2^8381660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8381660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11128320).

8381660 is an abundant number, since it is smaller than the sum of its proper divisors (13874980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8381660 is a wasteful number, since it uses less digits than its factorization.

8381660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 8381660 is about 2895.1096697707. The cubic root of 8381660 is about 203.1312214268.

The spelling of 8381660 in words is "eight million, three hundred eighty-one thousand, six hundred sixty".